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Model D50 service manual, SMD50l-ac Page 5

eskridge, inc. olathe, KS. 913-782-1238                                                                                                                                    www.eskridgeinc.com

unit Disassembly Procedure

There are two types of model D50 units: single planetaries with-

out a primary carrier and double planetaries with a primary planet 

carrier. The differences in disassembling single stage and double 

stage gearboxs  are clearly defined throughout this manual.
All parts should be inspected as they are removed from unit. 
1) 

Scribe across base 

(1)

, ring gear 

(8)

 and cover/ bail assembly 

(3)

 joints on outside of gearbox to assure proper orientation 

of oil fill and drain plugs, motor mounting, etc., as the unit is 

reassembled.

2) 

Remove hydraulic motor 

(15)

 from auger drive. Drain oil.

3) 

Remove  the  twelve  7/16  x  4-1/2”  socket  head  cap  screws 

(12a)

  and  7/16  lockwashers 

(12b)

,  which  retain  cover/bail  

assembly 

(3)

 and ring gear 

(8)

 to base 

(1)

.

4) 

Lift cover / bail assembly 

(3)

 off of unit.

Single stage: Remove input gear 

(4)

, input thrust washer 

(7a, 7b)

 carrier assembly

 (7) 

and ring gear

 

(8)

.

Double Stage:Remove input gear 

(4)

, input thrust washer 

(9a)

 primary carrier assembly

 (5). 

Remove 

secondary  sun 

(6)

  thrust  washer 

(9b) 

and 

secondary carrier 

(7)

.

5) 

The gearing is now disassembled and area(s) requiring re-

pair or service should be identified by thorough inspection 

of the parts after they have been washed in solvent. Rotate 

planet gears to check for any abnormal noises or roughness 

in  the  primary  planet  bearings.  At  the  same  time,  inspect 

planet gears for any damage or worn teeth. Replace carrier 

assembly if any problems are found in the carrier assembly.

base Subassembly

Disassembly

1) 

Place unit on a press table with the output shaft 

(2)

 protruding 

downward through a hole in the table; unit should be support-

ed only by the base 

(1)

. The only thing retaining output shaft 

(2)

 is the locking ring 

(14b)

 and split ring segments

 (14c)

Remove the locking ring 

(14b) 

by prying upward, split ring 

segments 

(14c)

 and shims 

(14a).

 

cauTion:  The  load-n-lock  assembly  is  no  longer  retaining 

output shaft.  Take precautions if the unit is moved as the shaft 

may fall out.

2) 

With output shaft down through centerhole in press table and 

unit  supported  by  base,  press  shaft  out  by  applying  press 

load to top end of shaft 

(internal end) 

until it passes through 

inner shaft bearing 

(11c)

. Outer shaft bearing 

(11a) 

and seal

 

(10b)

 will come out of unit attached to shaft.

3)   Inspect inner and outer bearing cups 

(11b & 11D)

. If cups are 

damaged remove and replace both bearing cups and cones.

cauTion: care should be taken not to injure feet or damage 
output shaft during this procedure.

4) 

If outer bearing cone 

(11a)

 needs to be replaced, it will need 

to be pressed off of output shaft. Also inspect inner bearing 

cone 

(11c)

. If any one bearing component needs replaced 

replace the both the cup and cone as a set.

noTe: When installing or removing bearings, press only on 

inner race of bearing cone. Do noT press on outer roller cage 

of bearing or it will damage bearing.

5) 

Clean all foreign material from magnetic oil plug 

(13)

 located 

on  bottom  of  base 

(1)

. Add  a  small  amount  of  pipe  thread 

compound to pipe plug before installing it back into base.

unit reassembly

1) 

Start  with  base 

(1)

.  Turn  base  upside  down  and  position 

on press table. Base should be pointing upward with outer 

bearing cup 

(11b)

 exposed. Apply a layer of lithium bearing 

grease to bearing cup surface.

2) 

Invert  output  shaft 

(2,  load-n-lock  retainer  groove  end 

down)

 and carefully lower into base 

(1)

 until the shaft’s out-

er  bearing  cone 

(11a)

  is  seated  against  outer  bearing  cup 

(11b)

.

3) 

Press shaft seal 

(10b)

 into base until it is flush with bottom of 

pilot diameter. Use a press fixture, if possible, to avoid distort-

ing seal. If press fixture is not available, a hammer and flat-

ended drift may be used by tapping outer edge of seal lightly 

and alternating sides.

4) 

Stand base assembly upright on output shaft.

cauTion: The only thing holding output shaft and base to-

gether at this point is the tightness in fit of the shaft seal.  Se-

curely and cautiously turn unit upright, not allowing base and 

shaft to separate.

5) 

While holding output shaft 

(2)

 with one hand, rotate base 

(1)

 

to be certain it turns freely and smoothly. The slight resistance 

felt, if any, is due to shaft seal load (drag) on output shaft.

6) 

Apply a layer of lithium bearing grease to inner bearing cup 

(11D)

 surface.

7) 

Install inner bearing cone 

(11c, small end down)

 over inter-

1

2

10B

11A

11B

11C

11D

14A

14B

14C

13

Summary of Contents for 50 Series

Page 1: ... version SMD50L Ac NOTE Individual customer specifications spindle mounting sprocket pilot brake assembly etc may vary from exploded drawing and standard part num bers shown If applicable refer to customer drawing for details 54 Motor Number 50 Model 2 Shaft 1 Bail Boss f Motor Supplier Example Part Number 05 Ratio ...

Page 2: ...R CUP 01 103 0140 11C 1 INNER CONE 01 102 0150 11D 1 INNER CUP 01 103 0130 12 12A 12 SHCS 7 16 20 X 3 0 GR8 01 150 1830 12B 12 LOCKWASHER 7 16 01 166 0340 12C 2 12 PT CBORE CS 1 2 13 X 1 25 GR8 01 150 1460 13 2 PIPE PLUG 3 8 NPT MAGNETIC 01 207 0070 14 14A SHIM 50 004 1521 14B 1 LOCK RING 50 004 1462 14C 1 SPLIT RING MODEL 50 50 004 1452 14D 1 GASKET 90 004 1081 15 1 MOTOR 01 304 0550 MoDel D50 Di...

Page 3: ...CONE 01 102 0140 11B 1 OUTER CUP 01 103 0140 11C 1 INNER CONE 01 102 0150 11D 1 INNER CUP 01 103 0130 12 12A 12 SHCS 7 16 20 X 4 1 2 GR8 01 150 1820 12B 12 LOCKWASHER 7 16 01 166 0340 12C 2 12 PT CBORE CS 1 2 13 X 1 25 GR8 01 150 1460 13 2 PIPE PLUG 3 8 NPT MAGNETIC 01 207 0070 14 14A SHIM 50 004 1521 14B 1 LOCK RING 50 004 1462 14C 1 SPLIT RING MODEL 50 50 004 1452 14D 1 GASKET 90 004 1081 15 1 M...

Page 4: ...emperatures and therefore must be given special consideration The max operating temp must not be exceeded under any circumstances regardless of ambient temperature If your unit was specified shaft up or with a Z option a grease zerk was provided in the base housing For shaft up operation the output bearing will not run in oil and must be grease lubricated Use a lithium based or general purpose bea...

Page 5: ...ess table and unit supported by base press shaft out by applying press load to top end of shaft internal end until it passes through inner shaft bearing 11C Outer shaft bearing 11A and seal 10B will come out of unit attached to shaft 3 Inspect inner and outer bearing cups 11B 11D If cups are damaged remove and replace both bearing cups and cones CAUTION Care should be taken not to injure feet or d...

Page 6: ... 14B onto output shaft 10 Lightly grease a new o ring 10A and install it into o ring groove in base 1 Assemble ring gear 8 to base 1 Re fer back to scribe marks made across external joints of gear drive prior to Disassembly Procedure Line up scribe marks between ring gear and base to give correct hole alignment NOTE Be certain that o ring 10A stays seated in groove during Step 10 11 Install second...

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